<template>
  <div>
    <!-- 面包屑区域 -->
    <el-breadcrumb separator=">">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <!--      表格-->
      <tree-table class="treeTable" :data="cateList" :columns="tableCol" show-index border
                  :selection-type="false" :expand-type="false">
        <!--        是否有效-->
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" v-if="scope.row.cat_deleted === false"
             style="color: lightgreen"></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <!--        排序-->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag size="mini" type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>

        <!--        操作-->
        <template slot="opt">
          <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button size="mini" type="primary" icon="el-icon-delete">删除</el-button>
        </template>
      </tree-table>
      <!-- 分页功能-->
      <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
                     :current-page="queryInfo.pagenum" :page-sizes="[1, 2, 5, 10]" :page-size="queryInfo.pagesize"
                     layout="total, sizes, prev, pager, next, jumper" :total="total">
      </el-pagination>

      <!--      添加分类的对话框-->
      <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%" @close="addCateDialogClose">

        <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">

          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
          </el-form-item>

          <el-form-item label="父级分类">
            <!--级联选择器   :options数据原-->
            <!--            cateProps配置对象-->
            <el-cascader expand-trigger="hover" :options="parentCateList" :props="cateProps"
                         v-model="selectedKeys" @change="parentCateChanged" clearable>

            </el-cascader>
          </el-form-item>

        </el-form>

        <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
      </el-dialog>
    </el-card>
  </div>
</template>
<script>
export default {
  data() {
    return {
      //选中的父级ID
      selectedKeys: [],
      //cateProps
      cateProps: {
        value: 'cat_pid',
        label: 'cat_name',
        children: 'children',
        checkStrictly: true
      },
      //表单验证
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      //添加分类的表单
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      //添加分类对话框隐藏
      addCateDialogVisible: false,
      //商品分类列表
      cateList: [],
      //父级分类列表
      parentCateList: [],
      //查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      //总数据条数
      total: 0,
      //自定义表格
      tableCol: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          //当前列使用模版列
          type: 'template',
          //模版列的名称
          template: 'isok'
        },
        {
          label: '排序',
          //当前列使用模版列
          type: 'template',
          //模版列的名称
          template: 'order'
        },
        {
          label: '操作',
          //当前列使用模版列
          type: 'template',
          //模版列的名称
          template: 'opt'
        }
      ]
    }
  },
  methods: {
    //表单关闭事件
    addCateDialogClose() {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
    //添加分类的网络请求
    addCate() {
      // console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success('添加分类成功！')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    //选中项目改变函数
    parentCateChanged() {
      //如果selectedKeys.length > 0 发生改变
      if (this.selectedKeys.length > 0) {
        //当前分类的ID
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        //当前分类的等级
        this.addCateForm.cat_level = this.selectedKeys.length
        return
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    //获取父级分类
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.parentCateList = res.data
    },
    //添加分类对话框
    showAddCateDialog() {
      //获取父级分类列表
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    //监听pageNum改变
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    //监听pagesize改变
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    //获取商品数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status != 200) {
        return this.$message.error(res.meta.msg)
      }
      this.cateList = res.data.result
      this.total = res.data.total
    }
  },
  created() {
    this.getCateList()
  }
}
</script>
<style lang="less" scoped>
.treeTable {
  margin-top: 15px;
}

.el-cascader {
  width: 100%;
}
</style>